That’s fine by/with me!

That's not true.

That is hardly possible

That is absolutely impossible.

That’s good news!

That's your beer.

That's a challenge.

That proved effectual.

That’ll go off all right

That’s the whole point of the exercise

That's a big mistake.

That’s him all over!

That was a painful experience for us

That’s him down to the ground!

That's my opinion too.

That's my dear son.

That won't happen.

That puts another complexion on things/the matter

That caps the climax!

That gives me the creeps

That’s strictly forbidden.

That’s just as well

That’s a bit fishy

That’s mere child’s play

That makes my mouth water